JP2583073Y2 - Uncoiler power transmission - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a power transmission device for driving an uncoiler shaft of an uncoiler which performs a feeding and rewinding operation and a back tensioning operation, which is used for a coil line such as a press operation.

[0002]

2. Description of the Related Art Conventionally, for example, in Japanese Utility Model Laid-Open Publication No. 61-178740, the pressing force of a friction plate is configured to add a spring force and a piston force of a cylinder operated by pressurized air which is an adjustable pressure fluid. In this case, the minimum friction plate pressing force is a spring force.

[0003]

[Problems to be Solved by the Invention] In the above-mentioned conventional apparatus,
The piston force by the compressed air is added to the spring force to make the friction plate pressing force. For feeding and rewinding work, high pressure air is used to increase the friction plate pressing force to increase the transmission torque, and the back tension work for preventing the uncoiler shaft from running away is performed with the spring force and the adjusted pressure applied to it. The back tension is generated by the transmission torque, that is, the slip torque, as the necessary friction plate pressing force by the piston force of the cylinder operated by the air.

Further, the spring force in this conventional device needs to be a friction plate pressing force, which is a slip torque for resisting the force of the coil material itself to be loosened even when pressure air is not supplied. However, when the coil is narrow, thin, or low in strength, the back tension must be reduced.However, the minimum friction plate pressing force during back tension work is when the pressure air is zero. Since the friction plate pressing force is a spring force, the transmission force becomes excessively necessary for the back tension operation, and excessive back tension acts to damage the coil.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a spring force sufficient to prevent unwinding and rewinding operations and to prevent the coil material itself from unraveling. The friction plate pressing force that becomes the transmission torque is applied, and during back tension work, fluid pressure is applied to the cylinder to adjust the friction plate pressing force obtained by subtracting the piston force from the spring force, that is, from zero to the spring force to obtain the necessary transmission torque. .

[0006]

According to the present invention, during normal operation when the coil material is pulled out by another device such as a leveler during operation of the press machine, the transmission torque of the power transmission device, that is, slip torque acts as the back tension. At this time, the friction plate pressing force is adjusted by adjusting the fluid pressure so that the required transmission torque is obtained by adjusting the fluid pressure according to the width, thickness, material, and the like of the coil material. During the feeding and rewinding work and the work to prevent the coil material from unraveling, the maximum transmission torque that releases the pressure fluid of the cylinder to zero the piston force and uses only the force of the spring as the pressing force of the friction plate Performed by

[0007]

1 and 2, an embodiment of the present invention will be described. In FIG. 1, the body of the uncoiler is provided with a rotatable uncoiler shaft 5 provided with a drum holding a coil at the right end, and a reduction gear 2, and the reduction gear is provided with a motor 1 and a power transmission device 4 of the present invention. ing. At the time of unwinding and rewinding work, the sprocket 6, chain 7, sprocket 8
The power is transmitted to the uncoiler shaft 5 using. Power is transmitted from the uncoiler shaft 5 to the motor through the reverse path to that described above when the back tension operation and the force for loosening the coil material itself are prevented.

FIG. 2 shows a power transmission device according to the present invention, in which a hub 11 fixed to an output shaft 3 of a speed reducer and a ring 13 fixed to the hub 11 form a bearing 13 in which an inner ring is fixed, and the bearing 13 is an outer ring. A casing 16 and a sprocket 6 are fixed to the housing 14 and a piston 17 fixed to the output shaft 3 of the speed reducer.
At 0, it is slidable in the axial direction and fixed and held in the radial direction. Further, a spacer 21 and a bolt 23 are fixedly mounted on a cylinder 21 for pressing the friction plate 18 and slidable on the casing 16 in the axial direction. The cylinder 21 is further pressed against the friction plate 18 via a spring 24 and a spring receiver 25 and a push bolt 26. Fluid is supplied to the fluid pressure chamber 27 of the cylinder via a joint 28.

The fluid pressure is supplied from the supply port 31 to the pressure control valve 3.
The fluid is supplied to the fluid pressure chamber 27 of the cylinder of the power transmission device via the joint 28 via the joint 2. Since the pressure fluid supplied to the cylinder is displayed on the pressure gauge 33, the pressure control valve is adjusted so that a required friction plate pressing pressure is obtained.

[0010]

According to the present invention, the power transmission device can be adjusted to a required transmission torque only by the fluid pressure, and the uncoiler is easy to operate and can handle a wide variety of coil materials.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of the uncoiler of the present invention.

FIG. 2 is a diagram of the power transmission device of the uncoiler of the present invention.

[Explanation of symbols]

1 is a motor, 2 is a reducer, 3 is an output shaft of the reducer, 4 is a power transmission device, 5 is an uncoiler shaft, 6 is a sprocket, 7
Is a chain, 8 is a sprocket, 11 is a hub, 12 is a ring, 13 is a bearing, 14 is a housing, 15 is a retainer, 16 is a casing, 17 is a piston, 18 is a friction plate, 19 is a spacer, 20 is a bolt, 21 is a bolt. Cylinder, 22 is a spacer, 23 is a bolt, 24 is a spring, 25
Is a spring receiver, 26 is a push bolt, 27 is a fluid pressure chamber of a cylinder, 28 is a joint, 31 is a pressure air supply port, 32 is a pressure control valve, and 33 is a pressure gauge.

Claims (1)

(57) [Scope of request for utility model registration] 1. Used in a coil line for a press operation or the like.
In a friction plate type power transmission device for driving an uncoiler shaft mounted with an uncoiler coil for performing feeding and rewinding operations and other devices of a coil line, such as an uncoiler coil for performing back tension work necessary for preventing runaway when a coil is pulled out by a leveler. , A piston fixed to the shaft, and a friction plate movable in the axial direction and fixed in the radial direction to the piston,
A housing and a casing surrounding the friction plate and rotatable concentrically with the shaft, a cylinder axially movable and radially fixed to the casing, a spring for pressing the cylinder against the friction plate, A power transmission device for an uncoiler, comprising an adjustable pressure fluid for supplying a pressure fluid to a fluid chamber formed by a cylinder and the piston and reducing a pressing force of the spring.